Removal of mercury compounds by adsorption was investigated in this study. The experiments were conducted in a batch reactor at a pressure of 200 psig and temperature ranging from 30℃ to 75℃. Mercuric chloride, phenylmercuric acetate and diphenylmercury were used as representative compounds of mercury in petroleum. Mercuric Chloride, phenylmercuric acetate and diphenylmercury were used as representative compounds of mercury in petroleum. Mercuric chloride is an inorganic compound while pheylmercuric acetate and diphenylmercury represented organomercury compounds. These mercury compounds were added directly to toluene to obtain solutions containing 1000 ug/L of mercury. The adsorbents were alumina, Cu/Al2O3 and CUZn/Al2O3. These adsorbents were prepared by dry impregnation method. Alumina was impregnated with copper nitrate solution for Cu/Al2O3 preparation and with zine nitrate solution for An/Al2O3 preparation. Copper and Zinc loading were 2.5% and 5.0% by weight of each metal. CuZn/Al2O3 was prepared by impregnation of zinc nitrate followed by copper nitrate. Total metal loading in CuZn/Al2O3 was fixed at 5.0% by weight and weight ratio of copper to zinc was 1:1 Experimental results showed that removal of mercury was significantly dependent of temperature but independent on pressure. In addition, it was also depended on the nature of mercury compound types. Efficiency of adsorbent on mercury removal was in the following order: copper adsorbent > copper-zine adsorbent > zinc adsorbent > alumina adsorbent. Adsorption of mercuric chloride on alumina adsorbent was physical adsorption but that of phenylmercuric acetate and diphenylmercury was chemical adsorption. The efficiency of copper adsorbents increased with increasing of copper loading while the efficiency of zinc adsorbents varied according to types of mercury compound. The efficiency of CuZn/Al2O3 on mercury removal removal increased with increasing of temperature. Mercury compounds removal was in the order of : mercuric chloride > phenylmercuric acetate > diphenylmercury.